Coley,
We decided on the Dreams Riviera Cancun resort. We're working with a travel agent so it definitely helped to narrow down our choices. We also liked Dreams Tulum but felt it was too long of a drive from the airport for our guests. I completely feel you on the stress of picking a resort - you want it to be just right since everybody is traveling there at your request! Our TA said that everybody she has had do their DW at Dreams has not been disappointed, and I saw on here that everybody seemed pretty pleased with their Dreams wedding so that's what sold it for me
Good luck!